Electrical Characteristics (Continued)
a
The following specifications apply for Va
5V and V
15V and AGND
DGND
e
T 25 C.
J
e a
e a
to T ; all other limits T
e
e
0V, unless otherwise specified.
e
e
e
Boldface limits apply for T
T
J
T
§
A
MIN
MAX
A
Typical
(Note 7)
Limit
Units
(Note 8)
Symbol
Parameter
Conditions
V
IHC
Control Logic High
Threshold
2.2
V (min)
Digital Input Current
Write Time
(Note 17)
2.2
18
18
3
25
40
mA (max)
ns (min)
ns (min)
ns (max)
ns (min)
ns (max)
t
t
t
t
t
WR
DS
DH
CS
CH
Data Setup Time
Data Hold Time
Control Setup Time
Control Hold Time
35
18
40
0
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. DC and AC electrical specifications do not apply when operating
the device beyond its specified operating ratings. Operating Ratings indicate conditions for which the device is functional, but do not guarantee performance limits.
For guaranteed specifications and test conditions, see the Electrical Characteristics. The guaranteed specifications apply only for the test conditions listed. Some
performance characteristics may degrade when the device is not operated under the listed test conditions.
Note 2: All voltages are measured with respect to AGND, unless otherwise specified.
Va) the absolute value of current at that pin should be
l
k
Note 3: When the input voltage (V ) at any pin exceeds the power supply rails (V
IN
limited to 5 mA or less.
AGND or V
IN
IN
Note 4: The sum of the currents at all pins that are driven beyond the power supply voltages should not exceed 20 mA.
Note 5: The maximum power dissipation must be derated at elevated temperatures and is dictated by T , i and the ambient temperature, T . The maximum
JMAX JA
A
e
allowable power dissipation at any temperature is P
(T
JMAX
- T )/i or the number given in the Absolute Maximum Ratings, whichever is lower. The
D
A
JA
T
JMAX
( C) and i ( C/W) for the DAC0890CIJ are 125 C and 53 C/W, respectively.
§
§
JA
§
§
Part Number
T
( C)
§
125
i
( C/W)
§
53
JMAX
JA
DAC0890CIJ
Note 6: Human body model, 100 pF discharged through a 1.5 kX resistor.
Note 7: Typicals are at 25 C, unless otherwise specified, and represent the most likely parametric norm.
§
Note 8: Guaranteed to National’s AOQL (Average Outgoing Quality Level).
Note 9: Full Scale DAC-to-DAC Tracking is defined as the change in the voltage difference between the full scale output levels of DAC1 and DAC2. The result is
expressed in LSBs and it referred to the full-scale voltage difference at 25 C.
§
Note 10: Analog Crosstalk is a measure of the change in one DAC’s full scale output voltage as the second DAC’s output voltage changes value. It is measured as
the voltage change in one DAC’s full scale output voltage divided by the voltage range through which the second DAC’s output has changed (zero to full scale).
This ratio is then expressed in dB.
Note 11: Glitch Energy is a worst case measurement, over the entire input code range, of transients that occur when changing code. The positive and negative
areas of the transient waveforms are summed together to obtain the value listed.
Note 12: Digital Feedthrough is measured with both DAC outputs latched at full scale and a 2 ns, 5V step applied to all 8 data inputs. This gives the worst case
digital feedthrough for the DAC0890.
g
Note 13: Settling Time is specified for a positive full scale step to (/2 LSB. Settling time for negative steps will be slower but may be improved with an external
pull-down resistor. Negative settling time to (/2 LSB can be calculated for each range where t
e
e
6.23
g
6.23 (C
LOAD
) (R
LOAD
/10 kX) for the high range and t
S
S
(C
LOAD
) (R
/2.5 kX) for the low range.
LOAD
Note 14: Output Current Drive Capability is the minimum current that can be sourced by the output amplifiers with less than (/2 LSB reduction in full scale. Current
sinking capability is provided by a passive internal resistance of 10 kX in the high range and 2.5 kX in the low range.
Note 15: Output Short Circuit Current is measured with the output at full-scale and shorted to AGND.
Note 16: Power Supply Rejection Ratio is a measure of how much the output voltage changes (in parts-per-million) per change (in percent) in the power supply
voltage.
Note 17: Digital Input Current is measured with 0V and Va input levels. The limit specified is the higher of these two measurements.
3
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